An accordion is a musical instrument that produces sound by forcing air through reeds. It has a keyboard on one side and buttons on the other, allowing the player to create melodies and harmonies. When the player pushes and pulls the bellows, it compresses and expands, making the reeds vibrate and produce music. This instrument is often associated with folk music and is popular in various cultures around the world. You might hear an accordion in styles like Cajun, Polka, or Tango. Its unique sound adds a lively and festive atmosphere to many musical performances.